fix: remove copied code

pkg/server/completion.go

@@ -174,8 +174,6 @@ func formatLabel(str string) string {
 }
 
 func createCompletionItem(label, prefix string, kind protocol.CompletionItemKind, body ast.Node, position protocol.Position) protocol.CompletionItem {
-	mustNotQuoteLabel := IsValidIdentifier(label)
-
 	paramsString := ""
 	if asFunc, ok := body.(*ast.Function); ok {
 		kind = protocol.FunctionCompletion
@@ -190,6 +188,9 @@ func createCompletionItem(label, prefix string, kind protocol.CompletionItemKind
 
 	concat := ""
 	characterStartPosition := position.Character - 1
+	if prefix == "" {
+		characterStartPosition = position.Character
+	}
 	if prefix != "" && !strings.HasPrefix(insertText, "[") {
 		concat = "."
 		characterStartPosition = position.Character
@@ -206,9 +207,7 @@ func createCompletionItem(label, prefix string, kind protocol.CompletionItemKind
 		InsertText: insertText,
 	}
 
-	// Remove leading `.` character when quoting label
-	if !mustNotQuoteLabel {
-		log.Print(len(prefix))
+	if strings.HasPrefix(insertText, "[") {
 		item.TextEdit = &protocol.TextEdit{
 			Range: protocol.Range{
 				Start: protocol.Position{
@@ -227,46 +226,6 @@ func createCompletionItem(label, prefix string, kind protocol.CompletionItemKind
 	return item
 }
 
-// Start - Copied from go-jsonnet/internal/parser/lexer.go
-
-func isUpper(r rune) bool {
-	return r >= 'A' && r <= 'Z'
-}
-func isLower(r rune) bool {
-	return r >= 'a' && r <= 'z'
-}
-func isNumber(r rune) bool {
-	return r >= '0' && r <= '9'
-}
-func isIdentifierFirst(r rune) bool {
-	return isUpper(r) || isLower(r) || r == '_'
-}
-func isIdentifier(r rune) bool {
-	return isIdentifierFirst(r) || isNumber(r)
-}
-func IsValidIdentifier(str string) bool {
-	if len(str) == 0 {
-		return false
-	}
-	for i, r := range str {
-		if i == 0 {
-			if !isIdentifierFirst(r) {
-				return false
-			}
-		} else {
-			if !isIdentifier(r) {
-				return false
-			}
-		}
-	}
-	// Ignore tokens for now, we should ask upstream to make the formatter a public package
-	// so we can use go-jsonnet/internal/formatter/pretty_field_names.go directly.
-	// return getTokenKindFromID(str) == tokenIdentifier
-	return true
-}
-
-// End - Copied from go-jsonnet/internal/parser/lexer.go
-
 func typeToString(t ast.Node) string {
 	switch t.(type) {
 	case *ast.Array: